|Position|Team|Points|Played|Won|Drawn|Lost|For|Against|Difference|
|---|---|---|---|---|---|---|---|---|---|
|1|Paulistano|30|18|14|2|2|62|19|43|
|2|Palestra Itália-SP|29|18|14|1|3|59|21|38|
|3|Corinthians|26|18|12|2|4|51|16|35|
|4|Ypiranga-SP|25|18|11|3|4|56|34|22|
|5|AA São Bento|16|18|7|2|9|38|44|-6|
|6|Santos|13|18|6|1|11|36|43|-7|
|7|SC Internacional de São Paulo|11|15|3|5|7|26|44|-18|
|8|Minas Gerais|10|15|4|2|9|18|49|-31|
|9|AA das Palmeiras|6|15|3|0|12|27|57|-30|
|10|Mackenzie|2|15|1|0|14|11|57|-46|

Question: how many teams played 18 games?
Answer: 6